ANTHOPHYTA 377 



Family 300. Lactucaceae. Lettuces. Herbs with a 

 milky juice; calyx mostly capillary; 

 receptacle usually naked; flowers all 

 ligulate, so no proper rays; medium 

 sized to small plants. Lactuca, Hier- 

 acium, Cichorium, Taraxacum, (Leon- 

 todon). 



REFERENCE BOOKS 



A. Engler and K. Prantl, Die Naturlichen Pflanzenfamilien, 

 Leipzig, 1889 to 1909. 



C. E. Bessey, A Synopsis of Plant Phyla, Lincoln, 1907. 



A. Engler and E. Gilg, Syllabus der Pflanzenfamilien, Berlin, 

 1912. 



C. E. Bessey, Revisions of Some Plant Phyla, Lincoln, 1914. 



